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Old 02-24-2009, 02:19 PM   #1 (permalink)
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cam degreeing skunk2 pro 3

i built b20b crvtec engine.
piston size 86mm
cam skunk2 pro3.
my question:
1.how to do cam degreeing this skunk2 pro3?
2.during degreeing cam the reading taken from vtec lobe only?
3.must lock vtec rocker arm and how to lock it?
4.give some cam in n ex degree after do the degreeing for reference only.
TQ

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Old 02-24-2009, 03:04 PM   #2 (permalink)
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Re: cam degreeing skunk2 pro 3

Quote:
Originally Posted by madcivic View Post
i built b20b crvtec engine.
piston size 86mm
cam skunk2 pro3.
my question:
1.how to do cam degreeing this skunk2 pro3?
2.during degreeing cam the reading taken from vtec lobe only?
3.must lock vtec rocker arm and how to lock it?
4.give some cam in n ex degree after do the degreeing for reference only.
TQ
pro 3's are a serious cam. even if u follow skunk2's specs its still difficult to get them to idle corectly. i hope u have some kind of engine management cause u will be changing alot on the idle parameters. if u plan on going to the dyno right away which is a good idea with these cams theres no need to degree them in although knowing your piston to valve clearance is very important with these cams. i dont know much about these cams cause i have never had them and dont know anyone personally using them but the center line for those cams are way off from the factory centerlines. something like +4 on exhaust side and 0 or +1 on the intake.
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Old 02-24-2009, 03:12 PM   #3 (permalink)
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Re: cam degreeing skunk2 pro 3

if u really need good advice and u bought your skunk cams form a authorized dealer call skunk2 up and talk to tony or dr charles which i dont think does customer service. i dont think you'll get better advice from anyone else. they have no problem helping people out as long as its purchased form an authorized dealer.

Last edited by sek2dts@aol.com; 02-24-2009 at 03:18 PM.
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Old 02-24-2009, 03:42 PM   #4 (permalink)
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Re: cam degreeing skunk2 pro 3

i built this machine for drag race but i no idea to set this cam.
should i set 0.0 degree and setting with do dyno run?
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Old 02-24-2009, 04:20 PM   #5 (permalink)
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Re: cam degreeing skunk2 pro 3

Quote:
Originally Posted by madcivic View Post
i built this machine for drag race but i no idea to set this cam.
should i set 0.0 degree and setting with do dyno run?
noooo. like i said above the pro 3 centerlines( where skunk2 recommends the cams to be) are way off from 0-0. i would highly recommend not turning the motor over at 0-0 unless u checked your valve clearances. look at your spec sheet that u got with the cams.
Intake:
277/13.0 @ 1mm / 0.000” lash
Exhaust:
284/12.4 @ 1mm / 0.000” lash

thats far from 0-0
this is not a beginner cam to install. i highly recommend u call up skunk2 talk to him about your set up as most of us and probably u dont have dial indicators to properly degree cams. if u call them they can give u good advice on where to start. all i can give u is an about place to start and thats just from me looking at the spec sheet. your setup may need different adjustments. especially if u have oversized valves.
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Old 02-24-2009, 05:11 PM   #6 (permalink)
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Re: cam degreeing skunk2 pro 3



Having something like this is essential for such a serious cam.
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Old 02-24-2009, 05:34 PM   #7 (permalink)
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Re: cam degreeing skunk2 pro 3

and its one thing owning one of those /\ above. its another knowning how to use them. as racing angel stated, dial indicators are a must for a cam like this. can u install them without them? yes but if i were to install them without them i would not do it unless i got some real good advice from someone thats installed plenty of these and there not to many people that run these cams. im telling u the best advice you''ll get is from the maker of the cam.
if u do everything correctly you''ll be making some serious power on your setup though(250whp+)
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Old 02-25-2009, 03:11 AM   #8 (permalink)
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Re: cam degreeing skunk2 pro 3

i have degree tools kit.
1.degree wheel
2.dial indicator
3.pointer
i'll cx v2p clearence.
when do degreeing should vtec lobe to be lock?
any idea how to lock it?
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Old 02-25-2009, 04:05 AM   #9 (permalink)
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Re: cam degreeing skunk2 pro 3

how to: V2V and P2V - Honda-Tech
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Old 02-25-2009, 04:24 AM   #10 (permalink)
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Re: cam degreeing skunk2 pro 3

Quote:
Originally Posted by madcivic View Post
i have degree tools kit.
1.degree wheel
2.dial indicator
3.pointer
i'll cx v2p clearence.
when do degreeing should vtec lobe to be lock?
any idea how to lock it?
first u should check valve to valve clearance before u degree the cams. your cylinder head should be off for this. when check clearance u have to lock your rocker arms up. this can be done three different ways.
1- take the rocker pins and reverse them
2- place a bb(bb from a bb gun) and place it behind the pins
3- or what the service manual says and use a air compressor to lock it.(i have never used this method so i dont know much about it).
if you are not clear on exactly what steps u need to do for the valve clearance i can elaborate if needed.

Last edited by sek2dts@aol.com; 02-25-2009 at 02:36 PM.
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Old 02-25-2009, 11:11 AM   #11 (permalink)
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Re: cam degreeing skunk2 pro 3

sek2dts@aol.com...
u mean don't lock vtec rocker arm during degreeing.
can you explain more how to degreeing pro3
TQ
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Old 02-25-2009, 02:22 PM   #12 (permalink)
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Re: cam degreeing skunk2 pro 3

Quote:
Originally Posted by madcivic View Post
sek2dts@aol.com...
u mean don't lock vtec rocker arm during degreeing.
can you explain more how to degreeing pro3
TQ
heres skunks2 instructions. after u have degreed the cams in your not gonna be finshed. degreeing cams put u really close to where u need to be and saves alot of time and money for dyno usage but it will put the cams in a spot where u can just move the cam gears back and forth a degree or two instead of guessing like having them at 0-0 and having to move them around + and - 5 degrees to find out where they start to make power which could be very dangerous moving them around like that. it would be like having factory cams installed at -5in -5ex and not knowing what direction to go and make power and u guess and start moving the ex cam forwards back towards 0 there gonna be a big possibility your gonna bend your valves. thats why doing this is very important on a large cam.
skunk2 instructions.......
One of the keys to making power is to properly set camshaft timing; in other words, when valves open and close in relationship to the position of the piston and crankshaft is critical to the performance of the engine. The process of properly setting the camshaft position is referred to as “Degreeing the Cam”. Many beginner tuners mistakenly believe that to degree cams means setting the cam gears at a certain position such as “+1 intake & -2 exhaust”. Though this information may be useful at times, these settings may not be accurate on all motors. For example when the deck of a head or block
is machined, it will retard the cam timing. So the cam gear setting method may only apply to engines using the same type of cam gears with exact same head and block heights; and this also assumes that the given cam gear settings are the correct location for the cams. The most accurate way to set camshaft position is to properly “degree the cams”; this way you can be sure the cams are in the right position regardless of engine variations, deck heights, and cam gear marks. The method we are
introducing is a simple method for setting cam positions using peak lift measurements. Cam degreeing can also be used to check valve opening and closing positions, durations at various lifts, and peak lift measurements.

Step 1: Install a Degree Wheel onto the end of the
crankshaft, and bolt a pointer onto the block. The pointer
can be a sharpened piece of welding rod or coat hanger
that can be bent to change the position of the pointer.
Rotate the crankshaft to TDC, you can use a dial indicator
inserted down the spark plug hole or the piston stop
method; the piston stop method is more accurate. When
the crankshaft is at TDC, move the pointer so it points to
TDC / 0 degree on the degree wheel.
Step 2: Set-Up dial indicator with the tip on the retainer,
not the rocker arm. To get an accurate reading, It is
important to make sure that the axis of the indicator is
parallel with the axis of the valve. Make sure the rocker is
on the base circle of the camshaft, in other words, make
sure the valve is completely closed, and zero out the dial
indicator. We recommend that you degree the cam with
the lash set at 0.000.”
Step 3: Rotate the crankshaft. When the cam starts to
open the valve, the dial indicator will show the amount
of valve lift. Rotate the crankshaft and stop when the
pointer is pointing at the specified peak lift/center line
position. Loosen the cam gear bolts and rotate the
camshaft until the indicator is showing that the cam is at
peak lift. Tighten the cam gear bolts. Rotate the engine
two more rotations, stopping when the dial indicator
reaches peak lift, look down at the degree wheel to
make sure the position of the crankshaft is in the correct
location. If not, repeat step 3.
Step 4: Move the dial indicator to the other side of the
head, and repeat steps 2 and 3. When peak lift positions
of both the intake and exhaust cams are set in the proper
locations, the cams are considered to be degreed in.
Helpful Tip 1: When degreeing a camshaft, make sure
that you rotate the crankshaft in the direction the
engine normally runs. If you over shoot the position the
crankshaft is supposed to be in, do not rotate the engine
backwards, it will throw off your numbers because the
tensioner only works properly in one direction.
Helpful Tip 2: If you are having a hard time finding
the centerline because the cam dwells at peak lift, you
can take a reading of the degree wheel when the cam
reaches max lift less 0.003” before and after peak lift.
The middle of those two positions will be the centerline.

Last edited by sek2dts@aol.com; 02-25-2009 at 02:45 PM.
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Old 02-25-2009, 02:52 PM   #13 (permalink)
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Re: cam degreeing skunk2 pro 3

sorry i messed up above rockers should be locked.
heres the peak lift on both the cams
Peak Lift: Intake
100 ATDC
Peak Lift: Exhaust
104 BTDC
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